<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="https://cdn.jsdelivr.net/npm/vue@2.7.14/dist/vue.js"></script>
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.6.2/dist/css/bootstrap.min.css"
    integrity="sha384-xOolHFLEh07PJGoPkLv1IbcEPTNtaed2xpHsD9ESMhqIYd0nLMwNLD69Npy4HI+N" crossorigin="anonymous">
  <style>
    .red {
      color: red;
    }
  </style>
</head>

<body>
  <div id="app">
    <div class="container">
      <!-- 顶部搜索框模块 -->
      <div class="form-group">
        <div class="input-group">
          <h4>品牌管理</h4>
        </div>
      </div>

      <!-- 数据表格 -->
      <table class="table table-bordered table-hover mt-2">
        <thead>
          <tr>
            <th>编号</th>
            <th>资产名称</th>
            <th>价格</th>
            <th>创建时间</th>
            <th>操作</th>
          </tr>
        </thead>
        <tbody>
          <tr v-for="item  in list" :key="item.id">
            <td>{{item.id}}</td>
            <td>{{item.name}}</td>

            <!-- 如果价格超过100，就有red这个类 -->
            <td :class="{red:item.price>100}">{{item.price}}</td>
            <td>{{item.time}}</td>
            <td><a href="#" @click="del(item.id)">删除</a></td>
          </tr>
          <tr style="background-color: #EEE">
            <td>统计</td>
            <td colspan="2">总价: {{isAll}}</td>
            <td colspan="2">均价: {{avePrice}}</td>
          </tr>
        </tbody>
        <tfoot>
          <tr v-if="list.length===0">
            <td colspan="5" style="text-align: center">暂无数据</td>
          </tr>
        </tfoot>
      </table>

      <!-- 添加资产 -->
      <form class="form-inline">
        <div class="form-group">
          <div class="input-group">
            <input type="text" class="form-control" placeholder="资产名称" v-model="name" />
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <div class="form-group">
          <div class="input-group">
            <input type="text" class="form-control" placeholder="价格" v-model.number="price" />
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <!-- 阻止表单提交 -->
        <button class="btn btn-primary" @click.prevent='add'>添加资产</button>
      </form>
    </div>
  </div>
  <script src="https://cdn.bootcdn.net/ajax/libs/dayjs/1.11.7/dayjs.min.js"></script>
  <script>
    const app = new Vue({
      el: '#app',
      data: {
        name: "", // 名称
        price: 0, // 价格
        list:
          JSON.parse(localStorage.getItem('Llist')) || []
        // [
        // { id: 100, name: "外套", price: 199, time: new Date('2010-08-12') },
        // { id: 101, name: "裤子", price: 34, time: new Date('2013-09-01') },
        // { id: 102, name: "鞋", price: 25.4, time: new Date('2018-11-22') },
        // { id: 103, name: "头发", price: 19900, time: new Date('2020-12-12') }
        // ]
      },
      methods: {
        del (id) {
          this.list = this.list.filter(i => i.id !== id)
        },
        add () {
          // this.list.forEach(e => { if (e.name === this.name) alert('已存在的商品') })
          this.list.push({
            id: this.list.length + 100,
            name: this.name,
            price: this.price,
            time: new dayjs().format('YYYY-MM-DD HH:mm:ss')
          })
          this.name = ''
          this.price = 0
        }
      },
      computed: {
        isAll () {
          return this.list.reduce((s, n) => s + n.price, 0) || []
        },
        avePrice () {
          return (this.isAll / this.list.length) || 0
        }
      },
      watch: {
        list: {
          deep: true,
          handler (val) {
            localStorage.setItem('Llist', JSON.stringify(val))
          }
        }
      }
    })
  </script>
</body>

</html>